src/main/java/org/luaj/vm3/parser/ParseException.java

/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 5.0 */
/* JavaCCOptions:KEEP_LINE_COL=null */
package org.luaj.vm3.parser;

/**
 * This exception is thrown when parse errors are encountered.
 * You can explicitly create objects of this exception type by
 * calling the method generateParseException in the generated
 * parser.
 *
 * You can modify this class to customize your error reporting
 * mechanisms so long as you retain the public fields.
 */
public class ParseException extends Exception {

	/**
	 * The version identifier for this Serializable class.
	 * Increment only if the <i>serialized</i> form of the
	 * class changes.
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * This constructor is used by the method "generateParseException"
	 * in the generated parser.  Calling this constructor generates
	 * a new object of this type with the fields "currentToken",
	 * "expectedTokenSequences", and "tokenImage" set.
	 */
	public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
		super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
		currentToken = currentTokenVal;
		expectedTokenSequences = expectedTokenSequencesVal;
		tokenImage = tokenImageVal;
	}

	/**
	 * The following constructors are for use by you for whatever
	 * purpose you can think of.  Constructing the exception in this
	 * manner makes the exception behave in the normal way - i.e., as
	 * documented in the class "Throwable".  The fields "errorToken",
	 * "expectedTokenSequences", and "tokenImage" do not contain
	 * relevant information.  The JavaCC generated code does not use
	 * these constructors.
	 */

	public ParseException() {
		super();
	}

	/** Constructor with message. */
	public ParseException(String message) {
		super(message);
	}

	/**
	 * This is the last token that has been consumed successfully.  If
	 * this object has been created due to a parse error, the token
	 * followng this token will (therefore) be the first error token.
	 */
	public Token currentToken;

	/**
	 * Each entry in this array is an array of integers.  Each array
	 * of integers represents a sequence of tokens (by their ordinal
	 * values) that is expected at this point of the parse.
	 */
	public int[][] expectedTokenSequences;

	/**
	 * This is a reference to the "tokenImage" array of the generated
	 * parser within which the parse error occurred.  This array is
	 * defined in the generated ...Constants interface.
	 */
	public String[] tokenImage;

	/**
	 * It uses "currentToken" and "expectedTokenSequences" to generate a parse
	 * error message and returns it.  If this object has been created
	 * due to a parse error, and you do not catch it (it gets thrown
	 * from the parser) the correct error message
	 * gets displayed.
	 */
	private static String initialise(Token currentToken, int[][] expectedTokenSequences, String[] tokenImage) {
		String eol = System.getProperty("line.separator", "\n");
		StringBuffer expected = new StringBuffer();
		int maxSize = 0;
		for (int i = 0; i < expectedTokenSequences.length; i++) {
			if (maxSize < expectedTokenSequences[i].length) {
				maxSize = expectedTokenSequences[i].length;
			}
			for (int j = 0; j < expectedTokenSequences[i].length; j++) {
				expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
			}
			if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
				expected.append("...");
			}
			expected.append(eol).append("    ");
		}
		String retval = "Encountered \"";
		Token tok = currentToken.next;
		for (int i = 0; i < maxSize; i++) {
			if (i != 0)
				retval += " ";
			if (tok.kind == 0) {
				retval += tokenImage[0];
				break;
			}
			retval += " " + tokenImage[tok.kind];
			retval += " \"";
			retval += add_escapes(tok.image);
			retval += " \"";
			tok = tok.next;
		}
		retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
		retval += "." + eol;
		if (expectedTokenSequences.length == 1) {
			retval += "Was expecting:" + eol + "    ";
		} else {
			retval += "Was expecting one of:" + eol + "    ";
		}
		retval += expected.toString();
		return retval;
	}

	/**
	 * The end of line string for this machine.
	 */
	protected String eol = System.getProperty("line.separator", "\n");

	/**
	 * Used to convert raw characters to their escaped version
	 * when these raw version cannot be used as part of an ASCII
	 * string literal.
	 */
	static String add_escapes(String str) {
		StringBuffer retval = new StringBuffer();
		char ch;
		for (int i = 0; i < str.length(); i++) {
			switch (str.charAt(i)) {
			case 0:
				continue;
			case '\b':
				retval.append("\\b");
				continue;
			case '\t':
				retval.append("\\t");
				continue;
			case '\n':
				retval.append("\\n");
				continue;
			case '\f':
				retval.append("\\f");
				continue;
			case '\r':
				retval.append("\\r");
				continue;
			case '\"':
				retval.append("\\\"");
				continue;
			case '\'':
				retval.append("\\\'");
				continue;
			case '\\':
				retval.append("\\\\");
				continue;
			default:
				if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
					String s = "0000" + Integer.toString(ch, 16);
					retval.append("\\u" + s.substring(s.length() - 4, s.length()));
				} else {
					retval.append(ch);
				}
				continue;
			}
		}
		return retval.toString();
	}

}
/* JavaCC - OriginalChecksum=ef246095a930e4915c0d4bbf4c9880ad (do not edit this line) */